Chemistry - Complete P-block Question with Solution | TestHub
ChemistryComplete P-blockp-Block 15,16Medium2 minQB
ChemistryMediumsingle choice
Consider the following allotropes:
(I) Graphite,
(II) Graphene,
(III) Diamond,
(IV) Black phosphorus,
(V) White phosphorus,
(VI) Rhombic sulphur,
(VII) Fullerene (C₆₀).
Select the INCORRECT statement:
Options:
Answer:
D
Solution:
(A) True: (V), (VI) and (VII) are discrete molecules (P₄, S₈, C₆₀); the rest are giant covalent networks.
(B) True: each atom is bonded to 3 atoms in (I), (II), (IV), (V), (VII).
(C) True: (IV), (V) and (VI) atoms carry lone pair(s).
(D) is INCORRECT: graphite and rhombic sulphur are the most stable allotropes of C and S, white phosphorus is not the most stable allotrope of P; red and black phosphorus are more stable.
Answer: D.
Stream:JEESubject:ChemistryTopic:Complete P-blockSubtopic:p-Block 15,16
⏱ 2mℹ️ Source: QB
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